hard to say without more info on the fly. Most hydro stores and hardware stores carry a no-pest yellow paper. You can try using that if the flies are temporary. If the flies figure out how to next in your soil, then you will need to treat the soil with neem oil which is non toxic and sold in the same stores including wal-mart.
Prodaytrader Reviewed by Prodaytrader on . Workin on my Green Thumb Alright so i will check my grow setup and get the wattage and nutrients and all that fun stuff and will post it asap cause i know i won't get very precise answers without the specs. A few days ago i recently saw some flies in my box. I am not to sure if they are fruitflies or nats or what but the sit right around my Fluro lights and i just want a safe effective way to kill em all without harming my ladies. Any ideas? Rating: 5